Proverbs 10:32

The lips of the righteous, know what is pleasing, but, the mouth of the lawless, speaketh perversities.

Ecclesiastes 12:10

The Proclaimer sought to find out words giving delight, and to note down rightly, the words of truth.

Proverbs 2:12

To rescue thee from the way of the wrongful, from the man that speaketh perverse things;

Proverbs 11:11

When the upright are blessed, exalted is the city, but, by the mouth of the lawless, it is overthrown.

Proverbs 12:6

The words of the lawless, are - of lying in wait for blood, but, the mouth of the upright, shall deliver them.

Proverbs 12:18

There is who babbleth, as with thrusts of a sword, but, the tongue of the wise, hath healing.

Proverbs 15:2

The tongue of the wise, adorneth knowledge, - but, the month of dullards, belcheth out folly.

Proverbs 15:28

The heart of the righteous, studieth to answer, but, the mouth of the lawless, belcheth out mischiefs.

Proverbs 18:6-8

the lips of a dullard, enter into contention, and his mouth, for blows, crieth out.

Ecclesiastes 10:12

The words of a wise man's mouth, are pleasant, - but, the lips of a dullard, will swallow him up:

Daniel 4:27

Wherefore, O king, let, my counsel, be pleasing unto thee, thy sin, then, - by righteousness, break thou off, and, thine iniquities, by shewing favour to the oppressed, - if so be it may become the lengthening out of thy security.

Titus 2:8

healthful discourse that cannot be condemned, in order that, he that is of the contrary part, may relent, having nothing to say concerning us that is disparaging:

Treasury of Scripture Knowledge

Summary

The lips of the righteous know what is acceptable: but the mouth of the wicked speaketh frowardness.

General references

Bible References

Know

Ecclesiastes 12:10
The Proclaimer sought to find out words giving delight, and to note down rightly, the words of truth.
Daniel 4:27
Wherefore, O king, let, my counsel, be pleasing unto thee, thy sin, then, - by righteousness, break thou off, and, thine iniquities, by shewing favour to the oppressed, - if so be it may become the lengthening out of thy security.
Titus 2:8
healthful discourse that cannot be condemned, in order that, he that is of the contrary part, may relent, having nothing to say concerning us that is disparaging:

General references

Matthew 15:18
while, the things which proceed out of the mouth, out of the heart, come forth, and, they, defile the man.